egg membrain hanging out of vent ..

i noticed this morning my one wyandotte had a egg membrain hanging out her vent ..i caught her and pulled it out ..it had some egg white in it but no yoke ...there was no shell attached to it as far as i could tell ..will she be ok .?..is there something i should do for her ..i noticed it when she was reaching around and pecking at her tail area..any help would be great ..i did have a bird with a prolapse vert when they were smaller but have no idea if this is the same bird..she is my biggest wyandotte and hate to think shes not well ..should i be offering more oyster shells ...